Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages

RedHat 9 (Linux i386) - man page for net::protoent (redhat section 3pm)

Net::protoent(3pm)		 Perl Programmers Reference Guide	       Net::protoent(3pm)

NAME
       Net::protoent - by-name interface to Perl's built-in getproto*() functions

SYNOPSIS
	use Net::protoent;
	$p = getprotobyname(shift || 'tcp') || die "no proto";
	printf "proto for %s is %d, aliases are %s\n",
	   $p->name, $p->proto, "@{$p->aliases}";

	use Net::protoent qw(:FIELDS);
	getprotobyname(shift || 'tcp') || die "no proto";
	print "proto for $p_name is $p_proto, aliases are @p_aliases\n";

DESCRIPTION
       This module's default exports override the core getprotoent(), getprotobyname(), and get-
       netbyport() functions, replacing them with versions that return "Net::protoent" objects.
       They take default second arguments of "tcp".  This object has methods that return the sim-
       ilarly named structure field name from the C's protoent structure from netdb.h; namely
       name, aliases, and proto.  The aliases method returns an array reference, the rest
       scalars.

       You may also import all the structure fields directly into your namespace as regular vari-
       ables using the :FIELDS import tag.  (Note that this still overrides your core functions.)
       Access these fields as variables named with a preceding "p_".  Thus, "$proto_obj->name()"
       corresponds to $p_name if you import the fields.  Array references are available as regu-
       lar array variables, so for example "@{ $proto_obj->aliases() }" would be simply
       @p_aliases.

       The getproto() function is a simple front-end that forwards a numeric argument to getpro-
       tobyport(), and the rest to getprotobyname().

       To access this functionality without the core overrides, pass the "use" an empty import
       list, and then access function functions with their full qualified names.  On the other
       hand, the built-ins are still available via the "CORE::" pseudo-package.

NOTE
       While this class is currently implemented using the Class::Struct module to build a
       struct-like class, you shouldn't rely upon this.

AUTHOR
       Tom Christiansen

perl v5.8.0				    2002-06-01			       Net::protoent(3pm)


All times are GMT -4. The time now is 11:08 AM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.
UNIX.COM Login
Username:
Password:  
Show Password